the city of oakland is expected to fight the request. they have until december to talk about the motion. >>> a sexting investigation is underway. they are questioning parents and students about photos. visitors visited two mill valley schools just this week. >> reporter: students we will not identify. >> there is a message on my phone. it was a blocked message. i was like -- it was junk. >> reporter: the principal of the middle school wrote to parents last week about quote inappropriate and provocative photos known as sexting of middle and high school girls circulated electrically to students from different schools. >> sending pictures of themselves and -- and it is pretty gross. [ laughter ] >> reporter: the sheriff's department, conducting the investigation, can not talk about the details. but they can at the office of education, they told us deputies have been interviews students and parents. >> the middle schools are sending pictures to friends. girls that are entering puberty, 13 and 14 years old. >> reporter: they tell me it has be